summaryrefslogtreecommitdiffstats
path: root/fs/libfs.c
diff options
context:
space:
mode:
Diffstat (limited to 'fs/libfs.c')
-rw-r--r--fs/libfs.c22
1 files changed, 6 insertions, 16 deletions
diff --git a/fs/libfs.c b/fs/libfs.c
index cd88abd..9e50bcf 100644
--- a/fs/libfs.c
+++ b/fs/libfs.c
@@ -338,28 +338,14 @@ int simple_readpage(struct file *file, struct page *page)
return 0;
}
-int simple_prepare_write(struct file *file, struct page *page,
- unsigned from, unsigned to)
-{
- if (!PageUptodate(page)) {
- if (to - from != PAGE_CACHE_SIZE)
- zero_user_segments(page,
- 0, from,
- to, PAGE_CACHE_SIZE);
- }
- return 0;
-}
-
int simple_write_begin(struct file *file, struct address_space *mapping,
loff_t pos, unsigned len, unsigned flags,
struct page **pagep, void **fsdata)
{
struct page *page;
pgoff_t index;
- unsigned from;
index = pos >> PAGE_CACHE_SHIFT;
- from = pos & (PAGE_CACHE_SIZE - 1);
page = grab_cache_page_write_begin(mapping, index, flags);
if (!page)
@@ -367,7 +353,12 @@ int simple_write_begin(struct file *file, struct address_space *mapping,
*pagep = page;
- return simple_prepare_write(file, page, from, from+len);
+ if (!PageUptodate(page) && (len != PAGE_CACHE_SIZE)) {
+ unsigned from = pos & (PAGE_CACHE_SIZE - 1);
+
+ zero_user_segments(page, 0, from, from + len, PAGE_CACHE_SIZE);
+ }
+ return 0;
}
/**
@@ -864,7 +855,6 @@ EXPORT_SYMBOL(simple_getattr);
EXPORT_SYMBOL(simple_link);
EXPORT_SYMBOL(simple_lookup);
EXPORT_SYMBOL(simple_pin_fs);
-EXPORT_UNUSED_SYMBOL(simple_prepare_write);
EXPORT_SYMBOL(simple_readpage);
EXPORT_SYMBOL(simple_release_fs);
EXPORT_SYMBOL(simple_rename);
OpenPOWER on IntegriCloud